Dynamoelectric machine with a superconductive field
winding for operation in either a synchronous
or an asynchronous mode

ABSTRACT

TWO PARALLEL MAGNETIC FLUX PATHS ARE PROVIDED IN A DYNAMOELECTRIC MACHINE HAVING A SUPERCONDUCTIVE FIELD WINDING. A FIRST, OR MAIN, MAGNETIC FLUX PATH INCLUDES AT LEAST ONE AREA OF NONFERROMAGNETIC OR DIAMAGNETIC MATERIAL A SECOND, OR SHUNT, MAGNETIC FLUX PATH PREVENTS THE RELATIVELY LOW FREQUENCY AC FLUX PRESENT DURING STARTING OR ASYNCHRONOUS OPERATION OF THE MACHINE, WHEN USED AS AN AC MOTOR, FROM PENETRATING THE SUPERCONDUCTIVE WINDING.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969. 869 0.0. 687. The abstracts oi. Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public to: inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits or alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED AUGUST 6, 1974 DYNAMOELECTRHC MACHINE WHTH A SUPER- CONDUCTIVE HELD WlNlDliNG FOR ()PERA- TliON IN EITHER A SYNCHRONOUS 0R AN ASYNiCONUiUEi MUDE Cecil J. Mole, Monroeviile, and Henry E. Hailer III,

Pittsburgh, Pa., assignors to Westinghouse Electric Corporation, Pittsburgh, Pa.

Filed Jan. 29, 1973, Ser. No. 327,520 lint. Ci. HilZir 9/00 US. Cl. 3i052 1 Sheet Drawing. 16 Pages Specification Two parallel magnetic flux paths are provided in a dynamoelectric machine having a superconductive field Winding. A first, or main, magnetic flux path includes at least one area of nonferromagnetic or diamagnetic material. A second, or shunt, magnetic flux path prevents the relatively low frequency AC flux present during starting or asynchronous operation of the machine, when used as an AC motor, from penetrating the superconductive winding.

Aug. 6, 1974 J, MOLE ETAL DYNAMOELECTRIC MACHINE WITH A SUPERCONDUCTIVE FIELD WINDING FOR OPERATION IN EITHER A SYNCHRONOUS OR AN ASYNCHRONOUS MODE Fileddan. 29, 1973 

